A cruise ship on the River Douro near Peso da Regua. There are many such trips leaving Porto ranging in a few hours duration to a few days. ©Can Stock Photo Inc/phbcz Posted by Travel in Portugal on Sat, 21/12/2013 - 21:18 × Related images Avenida dos Aliados Corner Building - Porto Foz do Douro Promenade View from Clerigos Tower Red Rooftops in Porto Crystal Palace Super Bock Arena - Porto Diógenes & Santos - Porto